Stovepipe elbo w



'Aug. 11, 1925.

P. HOCHMAN E AL STOVEPIPE ELBOW Filed May 12, 19 24 mwv ' A TTORNEYS Patented Aug. 11, 1925.

PAUL HOCHMAN AND SIDNEY E.- ESKEW, OF BENTON, ILLINOIS.

STOVEPIPE ELIBO'W'.

Application filed May 12,

To all whom it may concern:

Be it known that we, PAUL I-IooHMAN and SIDNEY E. ESKEW, both citizens of the United States, and residents of Benton, county of Franklin, State of Illinois, have invented a new and useful Improvement in Stovepipe Elbows, of which the following is a full, clear, and exact description.

Our invention relates to improvements in stove pipe elbows, and it consists in the combinations, constructions, and arrangements herein described and claimed.

An object of our invention is to provide a stove pipe elbow so constructed that the connecting stove pipes may be cleaned without necessitating the removal of the elbow or of sections of pipes.

A further object of our invention is to provide an elbow of the corrugated type with a removable plate for closing an opening through the wall thereof, which closely contacts with the adjacent corrugated wall portions of the elbow, so as to form a tight connection therebetween. To this end, we construct a closure plate of resilient ma terial such as any spring metal so that it will tend to closely engage the adjacent side walls of the elbow when it is secured in place.

A further object of our invention is to provide a device of the type described by means of which either the horizontal or perpendicular sections of the pipe connected with the elbow may be cleaned, and which are equally accessible from the elbow.

A further object of our invention is to provide a device of the type described having a removable clean-out plate which is held in place on the elbow by a particularly novel construction.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

Our invention is illustrated in the accompanying drawings, forming part of this application, in which- Figure 1 is a side elevation of an embodiment of our invention,

Figure 2 is a sectional view of the device illustrated in Figure 1, and

Figure 3 is a fragmentary plan view of a portion ofthe device illustrated in Figure 2.

In carrying out our invention we make use of the ordinary type of corrugated sheet metal stove pipe elbow 1 arranged for c011- 1924. Serial No. 712,560.

nection at its mouths 2 and 3 with sections of stove pipe, such as are well known in the art. I The elbow 1 is provided with a rectangular opening 4'therethrough on the outermostside wall thereof, and at the point of intersection of the axesof the months 2 and 3 of the elbow. This opening 4 is indicated in dotted lines in Figure'S, the upper edge of the opening being shown in full lines.

It will be noted from inspection of the drawing that that portion of the wall through which the opening 4 is provided is corrugated.

We provide a corrugated closure plate 5 of spring steel or other resilient metal having its corrugations arranged to conform with the adjacent portions of the wall of the elbow 1 near the opening 4.

The plate 5 is provided with a lip 6 at the uppermost end indicated in dotted lines in Figure 3, which is arranged to enter the opening 4. The balance of the plate 5 is larger in breadth and length than the opening 4.

Means for holding the lowermost end of the plate 5 in close engagement with the adj acent side walls of the elbow is provided in a latch member 7 pivot-ally secured to the elbow 1 by means of a bolt 8, so that it may be swung aside to permit the disengagement of the closure plate 5 therefrom.

Inasmuch as the closure plate 5 is of resilient material, it will closely bind the adjacent parts of the elbow so as to form a virtually soot-tight seal. v

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. In operation our improved elbow is employed in precisely the same manner as the ordinary type of stove pipe elbow, and wherever the ordinary type of elbow may be used.

Normally the elbow is, as tight and intact as the ordinary elbow.

If, however, it is desired to clean ad jacent sections of a stove pipe or the elbow itself, the latch member 7 is moved to one side so as to disengage the adjacent end of the closure plate 5 therefrom. The plate may then be lifted upwardly and be entirely removed from the elbow, thus permitting the introduction of suitable cleaning tools, scrapers, or the like to either the horizontal or perpendicular sect-ions of a pipe.

It will be noted that since the closure for the opening 4 is not hinged to the elbow that there is little possibility of warping or mutilation of the closure during the process of cleaning by the introduction of scraping tools or the like through the opening. This construction assures the efficient operation of the device throughout its existence,

e claim:

1. A stove pipe elbow having corrugated walls, said elbow having an opening therethrougl'i and a resilient metal closure plate arranged to close said opening and to engage said stove pipe at one end of said opening,-

said closure plate being corrugated to conform and to he n close engagement withthe adJacent wall portlons of said elbow, whereby a substantially tight seal may be efliected between said plate and said elbow, and a latch for securing theouter end of said plate in close engagement with said elbow.

7 closure plate being arranged to partially enter said opening, whereby said plate is held against movement relative to said elbow in directions parallel with the corrugations of said elbow, said closure plate; beingcorrugated to conform with the corrugations in said elbow, andmean's for locking the outer ends of said plate in close engagement with. 

